/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.mpp.plan.planner.plan.node.process;

import com.google.common.base.Objects;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNodeId;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNodeType;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanVisitor;
import org.apache.iotdb.db.mpp.plan.planner.plan.parameter.OrderByParameter;

import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.List;

public class SortNode extends SingleChildProcessNode {

    private final OrderByParameter orderByParameter;

    public SortNode(PlanNodeId id, PlanNode child, OrderByParameter orderByParameter) {
        super(id, child);
        this.orderByParameter = orderByParameter;
    }

    public SortNode(PlanNodeId id, OrderByParameter orderByParameter) {
        super(id);
        this.orderByParameter = orderByParameter;
    }

    public OrderByParameter getOrderByParameter() {
        return orderByParameter;
    }

    @Override
    public PlanNode clone() {
        return new SortNode(getPlanNodeId(), child, orderByParameter);
    }

    @Override
    public List<String> getOutputColumnNames() {
        return child.getOutputColumnNames();
    }

    @Override
    public <R, C> R accept(PlanVisitor<R, C> visitor, C context) {
        return visitor.visitSort(this, context);
    }

    @Override
    protected void serializeAttributes(ByteBuffer byteBuffer) {
        PlanNodeType.SORT.serialize(byteBuffer);
        orderByParameter.serializeAttributes(byteBuffer);
    }

    @Override
    protected void serializeAttributes(DataOutputStream stream) throws IOException {
        PlanNodeType.SORT.serialize(stream);
        orderByParameter.serializeAttributes(stream);
    }

    public static SortNode deserialize(ByteBuffer byteBuffer) {
        OrderByParameter orderByParameter = OrderByParameter.deserialize(byteBuffer);
        PlanNodeId planNodeId = PlanNodeId.deserialize(byteBuffer);
        return new SortNode(planNodeId, orderByParameter);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        if (!super.equals(o)) return false;
        SortNode sortNode = (SortNode) o;
        return Objects.equal(orderByParameter, sortNode.orderByParameter);
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(super.hashCode(), orderByParameter);
    }
}
